ARRT subcategory · 12.5% of scored exam
Equipment Operation and Quality Assurance
Covers the x-ray generator and tube, the radiographic and fluoroscopic unit, image receptors and accessories, image processing and display, imaging informatics, and quality control. ARRT lists CR and DR receptors in the 2022 outline, and a digital detector in the 2027 outline, from 1 March 2027. X-ray production sits under Radiation Physics, and the anode heel effect under Image Acquisition.
25 of 200 scored questions under the 2022 content specification, in force through 28 February 2027. From 1 March 2027, the 2027 content specification lists 25 of 200.
Sample question
A free sample question, written for this page, like those in the 328-question Equipment QA bank. Read it, pick your answer, then expand the rationale.
Exposure reproducibility requires that output intensity be consistent from one exposure to the next to within what percentage?
Show answer and full rationale
Correct answer: B. 5%
A, Incorrect: 2% is tighter than the federal standard.
B, Correct: Correct. Reproducibility is the consistency of output from one exposure to the next at the same kVp, mA and time. The federal standard, 21 CFR 1020.31(b), sets a coefficient of variation of no more than 0.05 across 10 consecutive measurements taken within 1 hour. ARRT's outline lists QC topics but gives no tolerance values.
C, Incorrect: 10% is the limit Bushong gives for exposure linearity between adjacent mA stations, a different test.
D, Incorrect: 15% is looser than the federal standard.
Topics to study in this subcategory
Our study list, in common study terms where those differ from ARRT's. ARRT's content outline is the official list.
- Cathode and anode anatomy
- Image receptors: CR (PSP plates) and DR to 28 February 2027, digital detector from 1 March 2027
- Image processing: histogram, look-up table, brightness and contrast
- Tube loading, heat units and tube cooling
- Automatic exposure control: detectors and back-up timer
- Transformers (autotransformer, step-up, step-down)
- Rectification and ripple
- Image intensifier and brightness gain
- Quality control: beam restriction, receptors, display monitors, apron testing
Drill the full 328-question bank.
The free tier includes a 50-question quiz and a 200-question sample exam, 241 different questions in all. A paid plan unlocks all 2,584 ARRT-style questions, unlimited generated mock exams, and drills in this subcategory that adapt question order to you. Paid plans open soon.
Frequently asked questions
How many Equipment QA questions are on the ARRT Radiography Boards?
The Equipment Operation and Quality Assurance subcategory is 25 of the 200 scored questions under the 2022 content specification, in force through 28 February 2027, about 12.5% of the scored exam. From 1 March 2027, the 2027 content specification lists 25 of 200. The full Radtechprepper practice bank contains 328 questions in this category, giving you ample room to drill until the patterns are second nature.
What topics are in the Equipment QA subcategory?
Our study list for Equipment QA starts with: Cathode and anode anatomy; Image receptors: CR (PSP plates) and DR to 28 February 2027, digital detector from 1 March 2027; Image processing: histogram, look-up table, brightness and contrast; Tube loading, heat units and tube cooling; Automatic exposure control: detectors and back-up timer. The official list is the content outline in ARRT Radiography Content Specifications. Our list uses common study terms in places, and the outline is what ARRT publishes.
How should I study for the Equipment QA subcategory?
Start with the chapter overviews listed on this page, which cover the core concepts in plain English. Then drill questions, pause on every miss, read the rationale, and re-drill the same topic the next day. Space your review over several days instead of cramming.